The mechanical nature of cation-p interactions in aqueous medium was directly measured by use of a surface forces apparatus in a model system: one surface is coated with poly-L-lysine(PLL) as cations, and the other surface is coated with three kinds of aromatic homo-polymers (poly-L-tryptophan, PTrp; poly-L-tyrosine, PTyr; polystyrene, PS) as p systems. The interaction energy between two surfaces are dependent on types of competing cations (NR4 +, NH4 +, K+, Li+, Na+), contact time, competing cation concentration, and types of aromatic side groups (indole, phenol, benzene).The adhesion to PLL in terms of strength follows the order of PTrp> PS >PTyr and the adhesion to PTrp surface follows the order ofNR4 +> NH3R+≥NH4 +»K+> Li+, Na+, qualitatively consistent with theoretical simulations. The results directly proved the theory of cation-p interactions in aqueous system and verified the hypotheses to explain the physiological phenomena (eg. potassium channel and neuroreceptor).
키워드
Cation-pi interactionPottasium channelNicotinic acetylcholine receptorMussel adhesiveSurface force apparatus
저자
Dongyeop X. OH [ School of Enviromental Science and Engineering, POSTECH, Pohang, Gyeongbuk. ]
Dong soo HWANG [ School of Enviromental Science and Engineering, POSTECH, Pohang, Gyeongbuk. ]
Qingye LU [ Department of Chemical and Materials Engineering, University of Alberta, Alberta, Canada. ]
Hongbo ZENG [ Department of Chemical and Materials Engineering, University of Alberta, Alberta, Canada. ]
Yongjin LEE [ Department of Physics, POSTECH, Pohang, Gyeongbuk. ]
Yongseock JHO [ Department of Physics, POSTECH, Pohang, Gyeongbuk. ]
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동